/Engine/Source/Runtime/Core/Public/Containers/UnrealString.h
Returns whether this string contains the specified substring.
Returns whether the string contains the substring. If the substring is empty, returns true.
bool Contains ( const [FString](API\Runtime\Core\Containers\FString) & SubStr, [ESearchCase::Type](API\Runtime\Core\Misc\ESearchCase__Type) SearchCase, [ESearchDir::Type](API\Runtime\Core\Misc\ESearchDir__Type) SearchDir ) const